[Q] I hope I am able to get a answer to this....

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I hope I am able to get a answer to this. I have glanced over the past threads before I posted but did not find my answer. If I missed it, I am sorry, I have ADD.
One of my co workers liked my theme so much that he decided to root his Incredible 2 but he was so excited to have my theme/rom, he forgot to backup his stock verizon rom. Now he needs to take his phone back for repair for other reasons. My question is, Can I install MY verizon rom backup on his phone?
If so, how do I do it and can you please tell me in simple step by step in english or if not, what should he do?
Thank you very much everyone that reads and helps me on this matter
If this matters, the stock rom was Gingerbread (OTA).